package com.atguigu.gulimall.cart.controller;

import com.atguigu.gulimall.cart.service.CartService;
import com.atguigu.gulimall.cart.vo.CartItemVo;
import com.atguigu.gulimall.cart.vo.CartVo;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.annotation.Resource;
import java.util.List;
import java.util.concurrent.ExecutionException;

/**
 * @ ClassName CartController
 * @ Description TODO
 * @ Author admin
 * @ Date 2021/3/29 15:05
 * @ Version 1.0
 */
@Controller
public class CartController {

    @Resource
    private CartService cartService;

    /**
     * 获取当前用户的购物车商品项
     * @return
     */
    @GetMapping(value = "/currentUserCartItems")
    @ResponseBody
    public List<CartItemVo> getCurrentCartItems() {

        List<CartItemVo> cartItemVoList = cartService.getUserCartItems();

        return cartItemVoList;
    }

    /**
     * 去购物车页面的请求
     * 浏览器有一个cookie:user-key 标识用户的身份，一个月过期
     * 如果第一次使用jd的购物车功能，都会给一个临时的用户身份:
     * 浏览器以后保存，每次访问都会带上这个cookie；
     *
     * 登录：session有
     * 没登录：按照cookie里面带来user-key来做
     * 第一次，如果没有临时用户，自动创建一个临时用户
     *
     * @return
     */
    @GetMapping(value = "/cart.html")
    public String cartListPage(Model model) throws ExecutionException, InterruptedException {
        //快速得到用户信息：id,user-key在
        // UserInfoTo userInfoTo = CartInterceptor.toThreadLocal.get();
        CartVo cartVo = cartService.getCart();
        model.addAttribute("cart",cartVo);
       return "cartList";
    }

    /**
     * 添加商品到购物车
     * RedirectAttributes.addFlashAttribute():将数据放在session中，可以在页面中取出，但是只能取一次
     * RedirectAttributes.addAttribute():将数据拼接在url后面，?skuId=xxx
     * @return
     */
    @RequestMapping("/addCartItem")
    public String addCartItem(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num, RedirectAttributes attributes) {
        cartService.addCartItem(skuId, num);
        attributes.addAttribute("skuId", skuId);
        //为了防止成功页刷新可以重复提交添加商品，我们不直接转到成功页
        return "redirect:http://127.0.0.1:30000/addCartItemSuccess";
    }

    @RequestMapping("/addCartItemSuccess")
    public String addCartItemSuccess(@RequestParam("skuId") Long skuId, Model model) {
        CartItemVo cartItemVo = cartService.getCartItem(skuId);
        model.addAttribute("cartItem", cartItemVo);
        return "success";
    }

    @RequestMapping("/checkCart")
    public String checkCart(@RequestParam("isChecked") Integer isChecked,@RequestParam("skuId")Long skuId) {
        cartService.checkCart(skuId, isChecked);
        return "redirect:http://127.0.0.1:30000/cart.html";
    }

    @RequestMapping("/countItem")
    public String changeItemCount(@RequestParam("skuId") Long skuId, @RequestParam("num") Integer num) {
        cartService.changeItemCount(skuId, num);
        return "redirect:http://127.0.0.1:30000/cart.html";
    }

    @RequestMapping("/deleteItem")
    public String deleteItem(@RequestParam("skuId") Long skuId) {
        cartService.deleteItem(skuId);
        return "redirect:http://127.0.0.1:30000/cart.html";
    }




}
